High efficiency broadband multi-Mode transferred power amplifier for LTE and 3G applications

摘要

This paper proposes multi-mode transferred power amplifier design. Several discrete frequency points, along with their second and third harmonics are controlled simultaneously by a special output matching network in PA. It allows the PA to transfer its mode to different typical high efficiency classes in these deliberately selected frequencies, which are referred to LTE and 3G systems. The measurement results show high efficiency (>72%) in these points, including 1.9GHz, 2.0GHz and 2.6GHz. Also, the PA shows broadband characters, achieving 58%–76% drain efficiency at 1.9–2.9 GHz, and > 10W output power, 14.7–16.9dB gain at 1.9–2.7 GHz.